Prepon — who first rose to fame with her role as Donna Pinciotti on That '70s Show — plays Alex Vause on the Netflix hit, and became one of the stand-out characters on a show chock full of stand-outs. She had a big role in Season 1 as the lesbian drug cartel leader and ex-girlfriend of main character Piper Chapman, and was responsible for landing Piper in prison.

She played Alex as a manipulative yet complicated woman, an intelligent and highly sexualized but also deeply in love woman, and she became a fan-favorite fast. No one's entirely sure yet as to why Prepon's leaving the show — neither the actress nor the show's producers have commented on the matter.

But, so it is: we only have one more episode of Alex Vause left before she is very possibly gone forever. It's a devastating loss for fans of the show, that's for sure. We're sure gonna miss those glasses.